Magnetek IMPULSE VG+ Series 3, Instruction Manual, Page: 77 / 183

IMPULSE•VG+ Series 3 Instruction Manual – 07/25/05
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Load Check
Load Check function is a load-limiting feature that ensures the programmed load limit of the hoist is
not exceeded. It prevents the lifting (and potential loss) of a load that is overweight. When
IMPULSE•VG+ Series 3 detects an overload condition, it prevents any further raising. However, the
load can be lowered at the speed that is specified by constant C5-14 (Load Check Fault speeds).
NOTE: Precautions should be taken when using load check where two or more hoists are used to
lift a single load.
Example: Use a normally closed relay from the load check output to break the raise (FWD Run)
command to the other hoist(s). This will insure that all hoists stop lifting if one hoist is
being overloaded.
Parameter
Code
Display Function Range Initial Value
Access
Level
C5-01 Load Check 0/1 Determines whether Load
Check is enabled. 0 Adv
0 Disabled
1 Enabled
C5-02 LC Alarm Action Action at Load Check alarm
or fault. 4 Adv
0 Alarm Only
1 Decel to Stop
2 Coast to Stop
3 Fault Stop
4 Use B3-03 Method (allows Lower only)
C5-03 Min Torque Ref Minimum current/torque
reference during acceleration
that triggers Load Check. 0–100% 60 Adv
C5-04 Look Speed 1 First Load Check frequency
reference. 0–150 Hz 6 Adv
C5-05 I/T Ref for LS 1 Current/Trq Reference when
Fout or Fnfb - Look Speed 1 1-300% 160 Adv
C5-07 Look Speed 2 Second Load Check
frequency reference. 0–150 Hz 20 Adv
C5-08 I/T Ref for LS 2 Current/Trq Reference when
Fout or Fnfb - Look Speed 2 1-300% 160 Adv
C5-09 Look Speed 3 Third Load Check frequency
reference. 0–150 Hz 40 Adv
C5-10 I/T Ref for LS 3 Current/Trq Reference when
Fout or Fnfb - Look Speed 3 1-300% 160 Adv
C5-11 I/T Ref for > LS 3 Load Check Current when
Output Frequency > Look
Speed 3. 1-300% 160 Adv
C5-12 LC Holding Time Time for holding Output
Frequency to stabilize Output
Current. 0.00–2.55
sec 1.00 Adv
C5-13 LC Testing Time Time (after the LC Setting
Time) for comparing Output
Current with Reference
Current 0.00–2.55
sec 0.25 Adv
C5-14 LC Fault Speed Maximum lowering speed
after Load Check fault 0–30 Hz 6.0 Adv